And I never claimed building the pyramids was easy. I just said that the pyramid shape is the most stable.

It takes a lot more ingenuity to build a skyscraper than a pyramid.

And you never rebuked my claims: how do you explain the fact that pyramid design GRADUALLY evolved throughout the centuries? Did the aliens who could master interstellar travel need time to figure it out? Or is the more likely scenario true - that people slowly, through trial and error, learned how to build bigger and better pyramids as time went on?

And why is there nothing left behind? Surely there would be a piece of ancient space technology, or even a mummified corpse.

And even if, even IF, it turns out to be true that an advanced intelligence did help ancient man, then why do you assume it was ETs? Why not technologically advanced Atlanteans or time travellers or some other likely thing?

And do you honestly think that scientists would choose to ignore such a stunning discovery? Sure, you can argue that some might avoid the topic out of peer pressure, but it still doesn't mean that they can't examine your claim in secret. And why have not any retired scientists, with nothing to lose, come out of the woodwork in support of such fanciful notions? Many scientists DREAM of making the next great discovery. If there was ANY merit to the ancient alien hypothesis, then you can be sure researchers would have been all over it left and right.

And one more thing: why haven't any of these proponents of ancient alien hypothesis managned to publish even just ONE paper in a credible or semi-credible